PCI was in fact pretty standard for graphics cards, in the period between ISA and AGP.

Edit: link https://www.tomshardware.com/uk/reviews/graphics-beginners,1...

PCI graphics was standard around the time of Windows 3.11 and into Windows 95. Major difference in UI speed vs EISA graphics.

I used to work as a hardware technician in a local computer shop as a summer / weekend job back then. I installed dozens of 4mb Cirrus Logic PCI graphics cards when building PCs.

If I remember, AGP did not come out until later.

The motherboard multiple ISA and 1 PCI slot if I recall right. In fact I was testing VGA and also sound cards on the ISA slot. So checking sound and playing some mpeg video file.

I can maybe write up a short post about this if anyone would be interested more.

At home, away from work, I owned a mac which was running the power pc processor. And that was also 25 mhz. What I remember was how everything seemed integrated (e.g. not upgradable. Young me could not understand why there was no graphics card. I could only upgrade here the hard drive, or simm memory)